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MAS9011A1TC05 Datasheet(PDF) 3 Page - Micro Analog systems |
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MAS9011A1TC05 Datasheet(HTML) 3 Page - Micro Analog systems |
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3 / 9 page  DA9011.001 28 Jan 2004 3 (9) FUNCTIONAL DESCRIPTION The solar manager generates three signals: PO (Power On), LB (Low Battery) and SOL (Full Battery). These signals are produced by three comparators which have hysteresis build in. Each comparator compares supply voltage (VDD) to internal switching levels (see Electrical Characteristics on next page). The current consumption of the comparators is very low. The electrical parameters are described more detailed in the Electrical Characteristics chapter. PO signal can be used to stop the whole system whenever the power supply level has dropped low enough. When power supply voltage is too low, the PO goes high to give signal to watch microcontroller to go power down. LB signal indicates that the battery is low but not empty. LB goes high when power supply level is too low. SOL is used for battery charging control of the solar watch. When power supply voltage goes high enough, the internal PMOS switch between VDD and SOL pins is switched on to shunt the solar cell charging current and to prevent battery overcharging. In operation without an external Schottky diode between the pins SOL and GND, the voltage at pin SOL is clamped to about 700 mV below GND by a diode-connected PNP transistor. MAS9011 does not have any control pin. After the power supply is connected the device is ready to be used. |
Similar Part No. - MAS9011A1TC05 |
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Similar Description - MAS9011A1TC05 |
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